Identify the component of a triglyceride within the bracket
The Correct Answer and Explanation is :
The component of the triglyceride within the bracket in the given image is a fatty acid.
Explanation:
A triglyceride is a type of lipid composed of three fatty acid molecules attached to a glycerol backbone through ester bonds. It serves as a major form of energy storage in both plants and animals.
Structure of a Triglyceride
- Glycerol Backbone: This is a three-carbon molecule that serves as the base of the triglyceride.
- Fatty Acids: These are long hydrocarbon chains with a carboxyl (-COOH) functional group at one end. They can be saturated (no double bonds) or unsaturated (one or more double bonds).
- Ester Bonds: The carboxyl group of each fatty acid reacts with the hydroxyl (-OH) groups of glycerol, forming an ester bond through a condensation reaction (removal of water).
Identifying the Component in the Bracket
- The bracket in the image encloses a long hydrocarbon chain with a carboxyl (-COOH) group.
- This matches the structure of a fatty acid, which is a key component of triglycerides.
- Since triglycerides consist of three fatty acids linked to glycerol, the highlighted portion represents one of the fatty acids.
Function and Importance of Fatty Acids
- Energy Storage: Fatty acids in triglycerides store more energy per gram than carbohydrates.
- Cell Membrane Formation: Phospholipids, derived from fatty acids, are key components of cell membranes.
- Metabolic Role: During fasting, triglycerides are broken down into glycerol and free fatty acids, which are used for energy.
- Insulation and Protection: In animals, fat tissue provides thermal insulation and cushioning for organs.
In conclusion, the bracketed portion in the given triglyceride structure represents a fatty acid, which plays a crucial role in lipid metabolism and energy storage.